cast 0.3.0

Dart package to discover and connect with Chromecast devices

cast

Dart package to discover and connect with Chromecast devices

Installation

Add this to your package's pubspec.yaml file:

dependencies:
  cast: any

iOS

Since iOS 14 a few more steps are required https://developers.google.com/cast/docs/ios_sender/ios_permissions_changes

Usage

Start discovery service:

CastDiscoveryService().start();

List devices:

Widget build(BuildContext context) {
  StreamBuilder<List<CastDevice>>(
    stream: CastDiscoveryService().stream,
    initialData: CastDiscoveryService().devices,
    builder: (context, snapshot) {
      return Column(
        children: snapshot.data.map((device) {
          return ListTile(
            title: Text(device.name),
            onTap: () {
              _connect(context, device);
            },
          );
        }).toList(),
      );
    },
  );
}

Connect to device:

Future<void> _connect(BuildContext context, CastDevice object) async {
  final session = await CastSessionManager().startSession(object);

  session.stateStream.listen((state) {
    if (state == CastSessionState.connected) {
      _sendMessage(session);
    }
  });

  session.messageStream.listen((message) {
    print('receive message: $message');
  });

  session.sendMessage(CastSession.kNamespaceReceiver, {
    'type': 'LAUNCH',
    'appId': 'YouTube', // set the appId of your app here
  });
}

CastSessionManager is used to keep track of all sessions.

Send message:

void _sendMessage(CastSession session) {
  session.sendMessage('urn:x-cast:namespace-of-the-app', {
    'type': 'sample',
  });
}

Except for the launch message, you should wait until the session have a connected state before sending message.

Note

Some informations about the protocol used https://docs.rs/crate/gcast/0.1.5/source/PROTOCOL.md

$ pub global activate protoc_plugin
$ export PATH="$PATH":"$HOME/.pub-cache/bin"
$ protoc -I=./lib/cast_channel --dart_out=./lib/cast_channel ./lib/cast_channel/cast_channel.proto --plugin "pub run protoc_plugin"

Author

• Jonathan VUKOVICH-TRIBOUHARET